Even if effective enrolments are considered, the ratios will be higher for two reasons: (a) Multi-grade teaching because of unviable schools: size of villages in many parts of India is so small that it is difficult to get a minimum of 30 children for each standard; (b) The prevailing ratios in advanced countries are comparatively quite low.
a) La enseñanza de múltiples grados debido a escuelas que no son viables: los poblados de muchas partes de la India son tan pequeños que es difícil reunir el número mínimo de 30 niños;